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C. GERLACH.

POCKET KNIFE. I No. 456,811. Patented July 28; 1891.

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' UNITED STATES PATENT OFFICE.

CONSTANTIN GERLAOH, OF TRAGHENBERG, GERMANY.

POCKET KNIFE.

SPECIFICATION forming part of Letters Patent No. 456,811, dated July 28, 1891.

A plication fil d March 28, 1891. Serial No. 386,820. (No model.)

To CI/ZZ whom, it may concern.-

Be it known that I, CONSTANTIN GERLACH, master of the forest, of Trachenberg, in the Kingdom of Prussia, have invented new and useful Improvements in Knives, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to pocket-knives such as are used by sportsmen, and these improvements consist in the combination and arrangement in the knife of alarge blade, a cartridgeextractor, and a locking device. There may also be added to these the essential elements of the invention-a lead-pencil or an erasingblade, a corkscrew, a prieker or toothpick, and

a pair of tweezers.

Figure 1 represents an elevation of the knife; Fig. 2, an elevation with one of the sides of the handle removed, and Fig. 3 is a longitudinal section along the line ct 1), Fig.1.

A is the large blade; B, the universal cartridge-extractor; C, the locking device; D, the pen or erasing-blade; E, a corkscrew; F, a pricker or toothpick, and G a pair of tweezers.

The blade A, the cartridge-extractor B, and the locking device 0 are mutually dependent and essential. Assuming the knife to be closed and the locking device 0 drawn back by means of its knob c, the cartridge-extractor may be pressed downward by the thumb, so as to exert a pressure upon the projection a of the blade-spring, upon which the detent a is formed, thus forcing the detent out of 0011- tact with the heel of the blade A. When the blade A is closed, its heel is in contact with the spring a. Consequently, when the cartridge-extractor is depressed, as hereinbefore described, and the detent is removed out of contact with the heel o'tthe blade, the spring a forces the blade open, whereupon the press ure on the extractorB being released the'detent engages with a recess formed in the heel of the blade A, which is thus locked, as shown in Fig. 2. The locking device C is now pushed back into its former position, as represented in Fig. 2, bringing the slide 0 under the notch 1) formed in the extractorB, so that the latter can no longer be caused to press upon the projection o. ofthe blade-spring. This arrangement prevents the accidental closing of the blade A, and the locking-bolt is prevented from accidentally moving, by means of the sliding spring The knife may thus be carried with an absolute certainty that the blade A cannot he accidentally closed or opened.

The universal cartridge-extractor B, which acts as a lever, as hereinbefore described, has for its further principal use the extraction of centralfire cartridges, for which purpose the segmented recess b b is forced in front of the extractor and in use is inserted under the rim of the cartridge. A hole I) and a groove 12 may also be formed in the extractor for the purpose of extracting Lefancheur cartridges by their pins. Broken cartridges maybe extracted by the wedge-like edge b, which part of the extractor may also be used as a screw-driver, a knot-opener, a champagneopener, a tree-marker, and for other purposes. The back of the extractor may-be serrated or cut as a file, as shown at U when it will afford a firmer grip for the finger, and may be used for various purposes, as is well understood.

What I claim, and desire to secure by Letters Patent of the United States, is-

l. A pocket-knife in which the main blade is disengaged by means of a second blade and in which the accidental release of the main blade is prevented by a locking device, constructed and arranged substantially as hereinbefore described.

2. In a pocketknife, the combination and arrangement of a main blade with a bladespring having a projection thereon, a second spring, such as a, for opening the blade, a second blade, such as B, capable of being pressed upon the projection on the blade-spring, and a lockin g device, substantially as hereinbefore described and as illustrated by the accompanying drawings. a

3. In a pocket-knife, the combination of a main or spring bladeA and its spring having a projection and detent, a cartridge-extractor B, capable of actuating the spring of the blade A, and a second spring, such as a, for opening blade A, substantially as hereinbefore described.

4. In a pocket-knife, the combination and arrangement of a main or spring blade, such as A, and its spring having a projectiouand detent with a second blade adapted to actuate said spring and main blade, and a locking device to prevent the accidental release of the main blade, substantially as hereinbefore (le 5 scribed.

5. In a pocket-knife, a universal cartridgeextractor blade provided witha segmental recess, such as If, the hole and groove Z) If, and a Wedge-like end, substantially as and 10 for the purpose described.

6. In a pocket-knife, the combination and arrangementof a spring-blade, such as A, and its spring having a projection with a cartridge-extractor B, having a notch b, and a locking device C, adapted to fit in said notch, I 5 substantially as and for the purpose described. In Witness whereof I have hereunto set my hand in presence of two Witnesses.

CONSTANTIN GERLACH. Witnesses:

PAUL FISCHER, W. BINDEWALD. 

